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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.dubbo.rpc.protocol.tri.observer;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.rpc.CancellationContext;
import org.apache.dubbo.rpc.TriRpcStatus;
import org.apache.dubbo.rpc.protocol.tri.CancelableStreamObserver;
import org.apache.dubbo.rpc.protocol.tri.ServerStreamObserver;
import org.apache.dubbo.rpc.protocol.tri.call.AbstractServerCall;
import java.util.Map;
public class ServerCallToObserverAdapter extends CancelableStreamObserver implements
ServerStreamObserver {
private static final Logger LOGGER = LoggerFactory.getLogger(CancelableStreamObserver.class);
public final CancellationContext cancellationContext;
private final AbstractServerCall call;
private Map attachments;
private boolean terminated = false;
public ServerCallToObserverAdapter(AbstractServerCall call,
CancellationContext cancellationContext) {
this.call = call;
this.cancellationContext = cancellationContext;
}
public boolean isAutoRequestN() {
return call.isAutoRequestN();
}
public boolean isTerminated() {
return terminated;
}
private void setTerminated() {
this.terminated = true;
}
@Override
public void onNext(Object data) {
if (isTerminated()) {
throw new IllegalStateException(
"Stream observer has been terminated, no more data is allowed");
}
call.sendMessage(data);
}
@Override
public void onError(Throwable throwable) {
final TriRpcStatus status = TriRpcStatus.getStatus(throwable);
onCompleted(status);
}
public void onCompleted(TriRpcStatus status) {
if (isTerminated()) {
return;
}
call.close(status, attachments);
setTerminated();
}
@Override
public void onCompleted() {
onCompleted(TriRpcStatus.OK);
}
public void setResponseAttachments(Map attachments) {
this.attachments = attachments;
}
@Override
public void setCompression(String compression) {
call.setCompression(compression);
}
public void cancel(Throwable throwable) {
if (terminated) {
return;
}
setTerminated();
call.cancelByLocal(throwable);
}
public boolean isTimeout(long cost) {
return call.timeout != null && call.timeout < cost;
}
@Override
public void disableAutoFlowControl() {
call.disableAutoRequestN();
}
@Override
public void request(int count) {
call.request(count);
}
}